19988155

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{6857}}^1$

素因数の和:6926

約数の個数: 16

約数和(自身を含む): 26663904

約数和(自身を除く): 6675749

約数列:

[1, 5, 11, 53, 55, 265, 583, 2915, 6857, 34285, 75427, 363421, 377135, 1817105, 3997631, 19988155]

約数ペア:

[(1, 19988155), (5, 3997631), (11, 1817105), (53, 377135), (55, 363421), (265, 75427), (583, 34285), (2915, 6857)]